I have a 2011 Camaro SS LS3 with the stock SS rear diffuser. I am wanting to buy the 1LE rear diffuser because I am getting quad tips. The part number is 22815277
My question is do I need to buy anything else for the install? Would I have to use any parts from the stock SS diffuser? Thanks.

So just to clarify, as I am buying the ZL1 Corsa cat back, on an SS car you ONLY need the diffuser (~$100)? Thats all you need to install it?

I have been looking for a cheap option to run quads without cutting mine... If this works I will order one ASAP. I remember looking at the ZL1 diffuser and you had a whole list of stuff you had to buy with it. If its only buying this, I will go pick one up today.

So just to clarify, as I am buying the ZL1 Corsa cat back, on an SS car you ONLY need the diffuser (~$100)? Thats all you need to install it?

I have been looking for a cheap option to run quads without cutting mine... If this works I will order one ASAP. I remember looking at the ZL1 diffuser and you had a whole list of stuff you had to buy with it. If its only buying this, I will go pick one up today.

That is correct. Here is my Corsa ZL1 exhaust with 1LE diffuser on my 2010 SS

Yes its more correct to call it an NPP diffuser, but even companies that sell it call it the 1LE diffuser and since I have a 1LE I dont mind...HAHA. Either way its certainly not something to be concerned about, everybody knows what is being talked about when referred to as the 1LE diffuser, so who cares.